Correcting Phase Polarity - Grizzly G0638HEP Manual

Correcting Phase Polarity

This subsection is only provided for troubleshoot-
ing. If you discover during the test run that the
machine will not operate, or that the impeller spins
backward, the power connections may be wired
out-of-phase. Without the proper test equipment
to determine the polarity of the power source legs,
wiring machinery to 3-phase power may require
trial-and-error. Correcting phase polarity is simply
a matter of reversing the positions where two of
the incoming power source wires are connected
inside the control box.
NOTICE
If this machine is wired out-of-phase, the
motor and impeller will spin in the wrong
direction. The efficiency of the dust col-
lector will be greatly reduced and will not
provide the rated CFM. You must make
sure the motor is spinning in the correct
direction before placing the machine into
full operation. Perform Step 10 of the test
run on Page 34 to make sure the machine
is correctly wired.
To correct phase polarity:
1. DISCONNECT MACHINE FROM POWER!
2. Open the control box and swap the connec-
tions of any two incoming hot wires from the
power source (see Figure 9).
Swap Any
Two
of These
Connections
Rd
Figure 9. Connections to change when
correction phase polarity.
Bk
-16-
Bk
Rd
Wt
33
28
1L/1 3L/2 5L/3 38
220V Overload Relay
2T/1 4T/2 6T/3
0
Bk Bk Bk Bk Bk Bk 96 95
2
98 97
8
7
Bk
Bk Bk Bk
2
Bk
1 2
2
6
Bk
R
A1
A2 A2 A1
1L/1 3L/2 5L/3 13NO 1L/1 3L/2
21NC
22NC
2T/1 4T/2 6T/3 14NO 2T/1 4T/2
3.
Secure the control box cover, then re-connect
the machine to power.
4. Perform Step 10 of the test run on Page 34
to confirm that the power connections are
correct.
— If the motor and impeller are still rotating
in the wrong direction, contact our Tech
Support at (570) 546-9663 for assistance.
5 3
T
0 230V 380V 440V
6
4 8
Transformer
2 10
0 12 E 220V 110V
Start Timer
1
Rd
Gn
2
1
R
2
T
4
A2 A1
5L/3 13NO 1L/1 3L/2 5L/3 13NO 6
21NC 21NC
22NC 22NC
Model G0637/G0638 (Mfd. Since 04/12)
5
3
6T/3 14NO 2T/1 4T/2 6T/3 14NO
0
R0 T1
R1
3
5
5
R
3
R0